PHEB_GUITH
ID PHEB_GUITH Reviewed; 177 AA.
AC P17243;
DT 01-AUG-1990, integrated into UniProtKB/Swiss-Prot.
DT 01-AUG-1990, sequence version 1.
DT 03-AUG-2022, entry version 112.
DE RecName: Full=B-phycoerythrin beta chain;
GN Name=cpeB;
OS Guillardia theta (Cryptophyte) (Cryptomonas phi).
OG Plastid; Chloroplast.
OC Eukaryota; Cryptophyceae; Pyrenomonadales; Geminigeraceae; Guillardia.
OX NCBI_TaxID=55529;
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX PubMed=2102376; DOI=10.1007/bf00017833;
RA Reith M., Douglas S.E.;
RT "Localization of beta-phycoerythrin to the thylakoid lumen of Cryptomonas
RT phi does not involve a signal peptide.";
RL Plant Mol. Biol. 15:585-592(1990).
CC -!- FUNCTION: Light-harvesting photosynthetic bile pigment-protein from the
CC phycobiliprotein complex.
CC -!- SUBUNIT: Heterotetramer of one alpha-1, one alpha-2, and two beta
CC chains.
CC -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane;
CC Peripheral membrane protein; Lumenal side.
CC -!- PTM: Contains three covalently linked bilin chromophores.
CC {ECO:0000250}.
CC -!- MISCELLANEOUS: The light-harvesting system in Cryptophytes contains
CC phycobiliprotein complexes. Unusually they are composed of either
CC phycoerythrin (CPE) or phycocyanin (CPC) but never allophycocyanin
CC (APC), with only one type of biliprotein being present in any one
CC species. Unlike cyanobacteria or red algae these proteins are not
CC arranged into higher-order phycobilisome complexes, and they are found
CC in the thylakoid lumen.
CC -!- SIMILARITY: Belongs to the phycobiliprotein family. {ECO:0000305}.
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DR EMBL; AF041468; AAC35631.1; -; Genomic_DNA.
DR EMBL; X52159; CAA36412.1; -; Genomic_DNA.
DR RefSeq; NP_050697.1; NC_000926.1.
DR AlphaFoldDB; P17243; -.
DR SMR; P17243; -.
DR GeneID; 856988; -.
DR HOGENOM; CLU_104219_0_0_1; -.
DR OMA; CYPTRRM; -.
DR GO; GO:0009535; C:chloroplast thylakoid membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0030089; C:phycobilisome; IEA:InterPro.
DR GO; GO:0015979; P:photosynthesis; IEA:UniProtKB-KW.
DR Gene3D; 1.10.490.20; -; 1.
DR InterPro; IPR009050; Globin-like_sf.
DR InterPro; IPR012128; Phycobilisome_asu/bsu.
DR InterPro; IPR038719; Phycobilisome_asu/bsu_sf.
DR Pfam; PF00502; Phycobilisome; 1.
DR PIRSF; PIRSF000081; Phycocyanin; 1.
DR SUPFAM; SSF46458; SSF46458; 1.
PE 3: Inferred from homology;
KW Bile pigment; Chloroplast; Chromophore; Electron transport; Membrane;
KW Methylation; Photosynthesis; Plastid; Thylakoid; Transport.
FT CHAIN 1..177
FT /note="B-phycoerythrin beta chain"
FT /id="PRO_0000199192"
FT BINDING 50
FT /ligand="(2R,3E)-phycoerythrobilin"
FT /ligand_id="ChEBI:CHEBI:85276"
FT /ligand_label="1"
FT /note="covalent, via 2 links"
FT /evidence="ECO:0000250"
FT BINDING 61
FT /ligand="(2R,3E)-phycoerythrobilin"
FT /ligand_id="ChEBI:CHEBI:85276"
FT /ligand_label="1"
FT /note="covalent, via 2 links"
FT /evidence="ECO:0000250"
FT BINDING 82
FT /ligand="(2R,3E)-phycoerythrobilin"
FT /ligand_id="ChEBI:CHEBI:85276"
FT /ligand_label="2"
FT /note="covalent, via 1 link"
FT /evidence="ECO:0000250"
FT BINDING 158
FT /ligand="(2R,3E)-phycoerythrobilin"
FT /ligand_id="ChEBI:CHEBI:85276"
FT /ligand_label="3"
FT /note="covalent, via 1 link"
FT /evidence="ECO:0000250"
FT MOD_RES 72
FT /note="N4-methylasparagine"
FT /evidence="ECO:0000250"
SQ SEQUENCE 177 AA; 18568 MW; C81FF28141F00641 CRC64;
MLDAFSRVVT NADAKAAYVG GADLQALKKF ISEGNKRLDA VNSVVSNASC IVSDAVSGMI
CENPSLISPS GNCYTNRRMA ACLRDGEIIL RYVSYALLSG DSSVLEDRCL NGLKETYSSL
GVPANSNARA VSIMKACAVA FINNTASQRK LSTPQGDCSG LASECASYFD KVTAAIS
